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ABOUT TRIPOD, HEAD AND VIBRATION

MARCH 2005

PAGE 9 OF 15

VIBRATION AMPLITUDE [um]

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0.5

9.8um

0.6

0.7 0.8 0.9 TIME IN SECOND

1.0

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vibration, we have a blurred grey image of do- nut. It is almost impossible to get rid of the small vibration. We have to live with the blurred do- nuts. The only difference is the amount of blur. These are the best brushes that we have today for making photography. Narrowing your eye will help visualize the results.

The donuts diameter was assumed to be 0.005mm and vibration signatures of previous experiments were used.

[Arca Swiss B1 #1]

VIBRATION AMPLITUDE [um]

[Markins M20 #1]

[FOBA #2]

Variations among each experiment are greater than equipment difference. This is the reason I recommend a vibration bracketing for a critical shot.

[Markins M20 #2]

If you ever astonished by a really sharp print, then you will admit that result by assuming 0.005mm sized donuts is not an exaggeration to carry my point.

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0.3

There are so many environmental parameters that cannot be neglected. So please don’t try to compare the products with this kind of not- simplified experiments. Instead, I’ll give you some fun stuff using above data.

Anyway, what we can get from above data is that we should always use MLU function.

Blurred Donuts

Do you remember that we are dealing with hot donuts of 0.005mm in diameter?

Motions of donuts being exposed on film is simu- lated for each vibration record. If there is no vi- bration, the resulting image will be a single black donut in maximum contrast. Because there is

[FOBA #1]

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[Arca Swiss B1 #2]

0.8

0.9

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0.5 0.6 0.7 TIME IN SECOND

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